If your at least experienced in crafting(wood shop) you can make little toy cars and walk around and sell em to your neighbors. Usually adults cause they give them to their kids. If you have extra wood or a tree in your backyard cut out a block of wood(you can also buy these from certain stores). Whittle the top of your car(leave the bottom flat). Use some sandpaper and smooth it out.Now to flip the car over. You can make wheels out of wood or buy plastic(i don't know where you can get these,i forgot where i bought them). Put a nail in the middle of the wheels and hammer it through the bottom of your car(it doesn't have to be perfect). Paint a cool design on it and sell it for about 3-5 bucks depending on how detailed it is!
Tips:if they make an offer to low negotiate with them.
Example: Buyer:I'll buy it for 2. You:6. Buyer:4. You:5. Buyer: Deal.
Bad example: Buyer:I'll buy it for 5. You:10. Buyer:9. You:13. Buyer:*flicks you off and walks away*